Resources Contact Us Home
Holographic digital watermark

Image Number 5 for United States Patent #7551750.

A digital watermark which is incorporated, perceptibly or imperceptibly, into a diffractive device such as a hologram. When applied to protect and/or authenticate a document of value or a product, the device provides an increased degree of overt and covert security, and permits tracking of the sale, use or other parameters associated with the product and/or document of value.

  Recently Added Patents
Wall flow type exhaust gas purification filter
Check weigher comprising of a rotating weighing chute with an accumulating and a discharge position that calculates flow rate by measuring weight accumulated during a predetermined time interv
Soybean cultivar CL0911444
Automated pizza preparation and vending system
Sample analyzing device
Apparatus and method for discharging capacitor of input filter of power supply, and power supply including the apparatus
Polymer compositions and nonwoven compositions prepared therefrom
  Randomly Featured Patents
Extension spring counterbalance system
Modular imaging system, modules for this system and method implemented using this system
Hybrid powertrain with an engine input clutch and method of control
Distortion correction control apparatus and distortion correction control method
Trans-modal animated information processing with selective engagement
Patch panel with hinged tie bar
Surface pattern for disposable absorbent article
Tile-line logo
Apparatus for the storage and extraction of blanks
Method of driving plasma display panel and plasma display panel in which a difference between starting timings of the sustaining time periods in adjacent blocks is set substantially equal to t